Features This Item Includes: Hollis Side-Mount SMS 75 Complete with Inflator, LP Hose, Over-Pressure Valve and Owner's Manual Designed for Side-Mount Cave Divers, Beginner, Advanced or Technical Divers Suitable for: Side Mounting Twin or Single Cylinders or Rear Mounted Singles System Uses: Any-Environment from Open-Water to the Overhead Environment System is Ready-to-Dive Out-of-the-Box Description Product Description The Hollis Side-Mount SMS75 is an evolution from years of Side-Mount Development, which started with the SMS100. The Hollis Side-Mount System is a product that has been copied, modified and a benchmark for Technical Side-Mount for years. Even more popular has been the lightweight SMS50 line. These two have taken Side-Mount mainstream and the building blocks this New-Harness. While it Caters-More to Hardcore Cave Divers, SMS75 was created to Handle-All-Environments. Proper Trim-is-Key in Side-Mount Diving and the Wing is designed with a Trapezoid Shape to Promote-Horizontal-Diving with Increased-Lift Towards-the-Hips where it's Needed-Most, and without modification. The SMS75 will also Support Rear-Mounted-Tanks with Cam Slots for Single Tank and Grommets at 11" (27.9cm) for Banded Doubles and Reversible Inflator Positions. The SMS75 Side-Mount System Harness comes equipped with Stainless Steel D-Rings on the Shoulder Straps with 4-Pre-Bent for Accessory Attachment. The Harness has Adjustable Shoulder and Sternum Straps equipped with Squeeze-Style" Side-Release Buckles for Easy Donning and Doffing. The Hollis SMS75 Harness has a Stainless Steel Latch-Style" Waist Buckle with Adjustable Crotch Strap. The Crotch Strap is equipped with an Additional Stainless Steel D-Rings for Attachment of Accessory or Scooter. All Hardware is manufactured from 316- Marine-Grade" Stainless Steel. The Hollis SMS75 Side-Mount System with Inflator Mechanism(s) and Overpressur