Unbeatable leather construction. Rear hook and loop adjustment for superior fit. Super grip inner lining to prevent slipping. Designed to fit 4oz MMA glove - 16oz when two gloves worn together. Designed to let you effortlessly switch back and forth between Mixed Martial Arts training and the Sweet Science, these 2-in-1 style fight gloves are made with a superior fit that allows you to slide your 4 oz MMA gloves inside, without the hassle of having to change gloves every time you want to switch things up.