I would like a study mat for outdoor use to protect my jump rope for double-unders. Will these withstand a high-speed cable rope and be slip-resistant?

Our 1/2" Mega Mats are great as a mat for plyometric exercises like jump roping. These mats are very shock and impact absorbent. Being made of rubber, these mats are very slip resistant and even more so when wet and are extremely durable.