Portable - Functional - Durable Go Anywhere.
Take these bad boys anywhere and find out why the U.S. Marines, SEALGrinderPT.com, top fitness bootcamps, personal trainers and outdoor athletes everywhere are using them. Not to mention the added benefits of training with sand, from further developing your stabilizer muscles to safety concerns when compared to iron or steel.
- Handmade of Ballistic Nylon: Puncture, tear, abrasion and UV resistant
- Use just about any filler: dry or wet sand, pebbles, gravel, dirt, mud...
- Webbing reinforced: 1,800lb+ tensile strength
- Made in U.S.A.