Latex rubber is porous so air will escape w/ each use- Worth the maintenance of light inflation every couple days as they far outperform other bladders- Butyl rubber bladders are heavy & slow and plastic bladders are oblong & have an inconsistent rebound. Made of durable easy to clean synthetic leather with reinforced triple-stitched seams and sizes measure as follows: XS = 5" x 8", S = 6" x 9", M = 7" x 10". Punch bag has a sleek tear-drop design that cuts through the air ensuring a fast and balanced rebound with a lightweight latex bladder included. This proven training tool will develop speed, timing, strength and endurance when training boxing, MMA, Muay Thai and contact sports alike. The Apex Speed Bag merges the traditional benefits of the past with the modern materials and intricate detailing of today.

League: MMA. Outer Material: Faux Leather. Color: Royal Blue/White. Brand: Ringside. Sport Type: Boxing, Mixed Martial Arts, Muay Thai. Size: Small. Date First Available: February 13, 2016. Best Sellers Rank: #80,584 in Sports & Outdoors. Customer Reviews: 4.2 out of 5 stars 512 ratings 4.2 out of 5 stars. : B01BMQXN36. Sport Type: ?Boxing, Mixed Martial Arts, Muay Thai. Size: ?Small. Outer Material: ?Faux Leather. Included Components: ?Speed Bag. Part Number: ?ASB1 RB/WH.SMAL. Manufacturer: ?Ringside Inc. Suggested Users: ?unisex-adult. Material: ?Leather. Color: ?Royal Blue/White. Model Name: ?Ringside Apex Speed Bag. Brand Name: ?Ringside. Item Dimensions LxWxH: ?8.02 x 4 x 1.5 inches. Package Weight: ?0.13 Kilograms. Item Package Dimensions L x W x H: ?8.74 x 7.4 x 2.91 inches.