Symbols and properties

The footwear has PrimaLoft® thermal insulation, which is made with 90% recycled materials. Water repellent, breathable and very light, PrimaLoft® thermal insulation keeps your feet dry in all conditions.

GORE-TEX lining is a unique waterproof lining material that allows the feet to breathe while keeping the moisture out of the footwear. This is the only membrane structure on the market systematically tested for its functionality and comfort.

The flexible FlexEnergy® component is integrated in the entire heel part of the shoe and provides maximum shock absorption of kinetic energy, with more than 55 % of the energy returned to you. The component is made of BASF’s TPU Infinergy® material, the world’s first expanded thermoplastic polyurethane.

Through its sole construction, ESD footwear provides a safe and controlled method of discharging the body’s static electricity. The resistance limits 100 kΩ - 35 MΩ for the Sievi ESD footwear are stricter than for antistatic footwear (IEC 61340-5-1). Wearing ESD footwear can help you avoid damage to sensitive electronic equipment.

The BOA® Fit System delivers micro-adjustable precision fit, engineered to perform in the toughest conditions. BOA® Fit System consists of three integral parts: a micro-adjustable dial, a super-strong lightweight lace and low friction lace guides.

The surface material of the DryStep® insole effectively transfers moisture away from the foot. DryStep®'s unique ventilation and pump action keeps your feet dry and comfortable.

Developed and patented by Sievi, the SieviAir® system dissipates the moisture generated as the feet warm up through exhalation channels in the side of the sole. The insole is perforated and has a filter underneath, which is connected to the flow channels. With every step you take the filter is compressed, returning to its original shape when the foot is lifted. This movement produces a pumping action, improving the ventilation of the shoe.

The 3D-dry® lining, developed by Sievi, transfers moisture away from the foot to the second layer of the lining material and further through the upper and away from the footwear.

The microporous FlexStep® sole material developed by Sievi maintains its excellent shock absorption and flexibility in freezing conditions. The structure of the FlexStep®flexible sole prevents strain on the feet and spine and absorbs shocks. The FlexStep® sole is used in all PU-soled Sievi footwear.

Sievi TractionPro® is a sturdy friction sole that gives stronger grip on slippery surfaces. The unique sticky rubber sole, together with the FlexStep® interlayer, developed by Sievi, ensure that the sole remains flexible in all conditions. The Sievi TractionPro® sole's structure and design, with its deep and sharp-edged tread profile, are designed to maximise friction and maintain grip on different surfaces. UK Design No. 6227543 UK Design No. 6227544

SieviBalance® torsional stiffener improves the rotational rigidity of the footwear and control of the foot, which reduces strain to the ankles.

Footwear equipped with the integrated Thermo heating system keeps your feet warm even in the most extreme conditions. Therm-ic Bluetooth® heating system can be paired with the Therm-ic app on your smartphone to provide a full overview of temperature, battery status and thermal settings. The rechargeable heating system provides heating for up to 22 hours (1st setting) with one charge.

The fireman symbol ensures that the boots fulfill the requirements of the fire footwear standard EN 15090:2012: F1 P A.

These shoes protect the user against chainsaw cuts and meet the Class 2 requirements of the EN ISO 17249:2013 standard for safety footwear with resistance to chainsaw cutting.

The flame symbol indicates that the footwear meets the requirements of the welding standard EN ISO 20349-2:2017 and protects against heat and splashes of molten metal.

The toecap protects toes from falling objects and compression. Meets the requirements of the EN ISO 20345:2022 standard: shock resistance is 200 J and resistance to compression 15000 N.

The toecap protects toes from falling objects and compression. Meets the requirements of the EN ISO 20345:2022 standard: shock resistance is 200 J and resistance to compression 15 000 N. The composite material toecap is completely metal free and insulates well against heat and cold.

The toecap protects toes from falling objects and compression. Meets the requirements of the EN ISO 20345:2022 standard: shock resistance is 200 J and resistance to compression 15 000 N. The aluminium toe cap is 50 % lighter than conventional steel toecaps.

The steel midsole prevents sharp objects from penetrating the sole. Meets the requirements of the EN ISO 20345:2022 standard: resistance to nail penetration is 1100 N.

The perforation resistance meets EN ISO 20345:2022 requirements: the perforation resistance is 1100 N. The perforation resistant midsole is tested with a 4.5 mm conical nail. Steel, however, gives greater perforation resistance, which is why Sievi recommends a midsole made of steel or the PS composite textile for more demanding conditions (e.g. the construction industry).

The perforation resistance meets EN ISO 20345:2022 requirements: the perforation resistance is 1100 N. The perforation resistant midsole is tested with a 3 mm conical nail.

The footwear sole resists oil and many chemicals. The oil resistance of Sievi footwear meets the requirements of the EN ISO 20345:2022 standard.

Antistatic footwear releases in a controlled manner static electricity accumulated in the body. The resistance limits are 100 kΩ - 1000 MΩ.

The upper material used in this footwear is water repellent. Its water resistance meets the requirements of the EN ISO 20345:2022 standard.

Shock-absorption of the heel is a requirement of EN ISO 20345:2022 and EN ISO 20347:2022 standards: the shock absorption of the footwear must be at least 20 J. In all Sievi footwear the cushioning effect is guaranteed by the use of FlexStep® sole material, see FlexStep® for more information.

The footwear is suitable for cold conditions. Depending on the model, the insulating material is lamb’s wool, artificial fur or PrimaLoft® insulation.

The footwear can be worn in hot environments. Sievi’s nitrile rubber sole withstands temperatures up to 300 °C.

The footwear sole is made of FlexStep® material. This single density microporous structured polyurethane sole offers very high slip-resistance and flexibility providing excellent shock absorption. Heat resistant up to 120°C.

The footwear sole is made of FlexStep® material. This single density microporous structured polyurethane sole offers very high slip-resistance and flexibility providing excellent shock absorption. Heat resistant up to 120°C.

The double density sole consists of polyurethane and elastic thermoplastic polyurethane. The outsole is wear resistant and the mid-layer is made of shock absorbing FlexStep® material. Heat resistant up to 120°C.

The footwear sole consists of polyurethane and rubber. The PU/rubber friction sole features excellent grip and wear resistant properties. The mid-layer of the sole is made of shock absorbing FlexStep® material. Heat resistant up to 300°C.

Models marked with this symbol have a useful zipper.

The stud mechanism integrated in the sole structure of the boot allows the studs to be turned in and out without removing the boots.

The safety shoe has reinforced ankle protection inserts on both sides to protect the ankle from side impacts and strains. The level of protection for the ankle meets the requirements of the safety footwear standard EN ISO 20345:2022 regarding impacts to the outside of the ankle. To meet the standard, average impact force must not exceed 10 kN during testing and no single value should be greater than 15 kN.

The ankle has PORON XRD® support (Lazer Roller High+) or viscoelastic memory foam that moulds itself to the wearer's foot, supporting the ankle and absorbing shocks.

Sievi’s Metashield® metatarsal guard is integrated into the shoe's structure and absorbs impacts on the instep by up to 90 percent. The guard, made of PORON XRD® material, is very flexible and its molecular structure, together with the shoe's breathable upper material, allows air to circulate and remove moisture from the shoe, making it very pleasant to wear. The Metashield® metatarsal guard offers significantly better protection than conventional safety shoes, without compromising comfort.

No metal parts are used in the footwear and metal detectors do not react to them.

Sievi XL ranges. These extra wide styles offer more space and comfort for the wearer. For footwear with XL width fittings see “XL” in the product name.

Footwear equipped with the integrated Thermo heating system keeps your feet warm even in the most extreme conditions. The rechargeable heating system provides heating for up to 22 hours (1st setting) with one charge.

Pohjallisessa käytettyjen kierrätysmateriaalien osuus on 67 % pohjallisen materiaalien painosta. Pinta on kulutuskestävää polyamidia, joka siirtää kosteuden jalan pinnasta pohjallisen alempaan kerrokseen. Antibakteerinen, hajuton. Kantaosan muotoilu pitää jalan rasvatyynyn optimaalisella paikalla. Muovautuu heti jalan mukaan ja palautuu muotoonsa käytön jälkeen. Antistaattinen ja konepestävä 40 °C.

The insole consists of three layers: a soft surface material, a breathable interlayer and a lightweight, shock-absorbing EVA bottom layer. On the heel and under the ball of the foot there is a PORON® shock absorbing cushion, which absorbs external shocks and reduces strain.

Sievi ALU insole features a heat-insulating aluminium layer. The aluminium foil of the insole reflects the cold out and the heat inward.

The Key Flag Symbol indicates that the product was made in Finland. The Sievi and Oulainen plants manufacture leisure footwear as well as safety and occupational footwear that have been awarded the Key Flag Symbol.