X Fit Straps Swix Strap X fit 3.0, Large SportFits Shop Biareview.com Xtreme Cables XFit Fitness Watch X FIT 43914 LIFTING STRAPS Copper Fit X. The Swix X Fit Strap has been designed and developed in collaboration with the top World Cup Biathlon athletes in order to provide a high performance strap that is easy to get in and out of. The X Fit strap has the performance of the Pro Fit 2 Triac 2. 0, but with a much easier entry and exit system. The strap contains neoprene pads for comfort and a solid layer of nylon on the outside for maximum durability. This combination allows for efficient power transfer during skiing, while maintaining optimal comfort. Details Neoprene padding surrounded by durable Nylon Easy entry and exit Available in Small, Medium, Large, and X Large Sold in pairs