SAS-TEC: High-quality visco elastic foam with impressive multi-impact shock absorbing properties 13mm Whether cruising groomers or exploring the backcountry, the Back Protector Vest provides comfortable all-mountain protection. The Back Protector Vest is comfortable and light, but offer supreme protection. The actual back protection material is a visco elastic foam from SAS-TEC - soft and comfortable, but with impressive multi-impact shock absorbing properties. The protection pad is 13mm thin and the vest has a wide waistband for personalized fit. Certified according to EN 1621-2:2014, Level 1 standard. Sweet Protection recommends the Race version where maximum safety for the back is required. Sweet Protection Men's Back Protector Vest