1, polyolefin gel; can be used more than 3 years and more than 100 times. 2, lift up and breathable 3, harmless, reusable Polyolefin gel and Silicone gel:1, the polyolefin gel can be used more than 100 times, but the silicone gel just a few of times.2, the polyolefin gel can be kept more than 3 years, but the silicone gel just 6 month or 12 month.3, the polyolefin more paster than silicone ♥♥ our ...