Mack Tuff 調節可能シリコンコックタイ クリア

The silicone has a nice soft stretch to it, no pinching even after an hour. The slide adjuster actually stays put once you set it, which I wasn't expecting at this price. Way better than the cheap rubber ones I've tried.

The lasso-style adjustment makes it ridiculously easy to get the perfect fit, and it held up all night without any slipping. The silicone feels smooth and comfortable too, even after hours of wear.