Bundle of 4: We now offer 2 leg bundles that measure 2"W x 40"L and 2 bracelets that measure 2"W x 26"L + carrying bag, making it a complete set for bite training. They are designed to provide excellent blood flow restriction to the target muscles through the working limb. These blood-restricting bands reduce muscle oxygenation to pre-deplete slow-twitch fibers and reduce their response to training load. Increases Muscle Growth Factors: Studies have shown that exercise can increase muscle protein synthesis, NOS-1 expression, and mTOR signaling, thereby increasing muscle growth. Research has also shown how tourniquets can be used in training to promote muscle growth and increase muscle building potential by reducing myostatin levels. Faster Lean Muscles and Great Tone Without Lifting Heavy Weights: Occlusal training bands cause muscle hypertrophy with minimal impact (usually 10-30% of 1RM). When applied to the working limb and combined with loads of 10-30% of 1RMs (high reps and minimal rest before fatigue begins), results tend to approach those achieved with 80% of 1RMs. In fact, with ease and without the need for high-intensity weightlifting, the Ischemic Band delivers lean muscle and amazing sound. SUPER STRONG AND SUPER COMFORTABLE STRAP: Equipped with a super elastic back strap, the PRO Package sports strap features a quick release buckle and elastic loop to keep slack, easy to fasten, easy to remove after exercising, and very comfortable on the working limb. This order comes with 4 tourniquets for occlusion. It retains its shape and elasticity when you use a bicep band or thigh band.Products from LUOLV's store