Radians Radwear SW21 TYPE R CLASS 3 STRETCH RIPSTOP WIND SHIRT Radians SW21-3 Type R Class 3 Stretch Ripstop Wind Shirt provides UPF40+ UV Sun Protection. The SW21 long sleeve work shirt is idea for site foremen, construction mangers and landscaping professional who need comfortable, high visibility protection from the wind and sun. Long Sleeve Vented Wind Shirt. UPF40+ UV Sun Protection. Stretch Ripstop Material. 2” Segmented Heat Transfer Reflective Tape. Left and Right Chest Pockets. Easy Access Slide Pocket with Magnet Closure. Color Blocking at Bottom. Meets ANSI/ISEA 107-2015 Standards.