Fox Baseframe Pro Short Sleeve Optimum Protection, Low Profile Find your flow in this premium mountain bike baselayer. The Baseframe Pro Short Sleeve boasts low-profile D3O(R) Viper(TM) foam padding, moisture-wicking technology, and a comfortable, ergonomic fit for maximum performance on the trail, designed to be worn under your jersey for discreet, everyday coverage. Features Exceeds Level 1 back certification, including high and low temperature conditions Removable, CE-certified back insert features world-leading impact protection technology Shoulder inserts for additional protection Large perforation and flex grooves in the back foam contour and flex with rider movement Body heat activates (softens) the polymer to conform naturally to your body Moisture-wicking, open stretch mesh for breathability SPECIFICATIONSIntended Use Mountain Biking, Trail, Enduro Protection EN1621-1 Level 1 (back and shoulders), CE certified D3O(R) Viper(TM)Material100% Nylon Elastic Mesh Sleeve Style Short Sleeve Fit Men's - Close/Snug SIZINGSize Chest Torso Length Height S35" - 37"32" - 32. 5"5'6" - 5'8"M38" - 40"32. 5" - 33. 5"5'8" - 5'10"L41" - 43"34-35"5'10" - 6'XL44" - 46"35" - 36"5'11" - 6'1" | Fox Apparel | Baseframe Pro Short Sleeve Men's | Size Small In Black | Nylon