Rival Boxing RS4 Aero Sparring Gloves - BlackRival Boxing RS4 Aero Sparring Gloves Black Introducing the NEXT generation of the RS4 Aero Sparring Gloves. With a completely re engineered, re designed construction, the NEXT generation RS4 2. 0 is now manufactured with a super resistant microfibre and an improved low density foam inner padding, for undeniable comfort and a snug fit. The new re engineering now allows you to make that perfect fist inside the glove. Add to that the newly designed