Hollis DX-300X Expedition Drysuit

The Hollis DX-300X is an expedition-grade drysuit designed for technical diving, cold-water diving, and demanding underwater environments. Developed by technical divers and tested in challenging conditions, the DX-300X combines rugged durability with comfort, flexibility, and freedom of movement.

The heavy-duty Nylon Cordura outer layer provides excellent puncture and abrasion resistance, with tear strength exceeding 300N. The 12-layer butyl middle layer provides long-term water integrity along with strong chemical and ozone resistance. A soft silk-weave polyester inner liner provides comfort and makes the suit easier to don and doff.

Hollis's patented bias-cut construction and telescopic torso provide increased freedom of movement while allowing a closer fit that helps reduce air migration inside the suit. The low-profile, flexible YKK zipper further enhances mobility.

The DX-300X is equipped with replaceable SiTech silicone neck and wrist seals, making seal replacement practical for extended trips and expeditions. Two large thigh bellows pockets provide convenient storage for essential dive accessories, with internal D-rings for securing equipment. Double-thickness knee pads and 5 mm neoprene socks add durability and protection in demanding diving conditions.

Key Features

Expedition-grade drysuit for technical and cold-water diving
Heavy-duty Nylon Cordura outer layer
12-layer butyl middle layer for long-term water integrity
Soft silk-weave polyester inner liner
Patented bias-cut construction with telescopic torso
Low-profile, flexible YKK zipper
Replaceable SiTech silicone neck and wrist seals
Two large thigh bellows pockets with Velcro closures and internal D-rings
Double-thickness knee pads
5 mm neoprene socks
Adjustable internal suspenders
3M reflective safety strips for visibility

Details

Type: Expedition-grade technical drysuit
Overall material weight: 700 g/sq.
Outer layer: Heavy-duty Nylon Cordura
Middle layer: 12-layer butyl
Inner liner: Silk-weave polyester
Neck and wrist seals: SiTech silicone
Zipper: Low-profile, flexible YKK
Pockets: Two large thigh bellows pockets with Velcro closures and internal D-rings
Footwear: 5 mm neoprene socks
Sizes: XS–XXXL

Size & Fit

Please refer to the Hollis DX-300X size chart shown in the product images before ordering. The chart provides the measurements needed to select the appropriate size.

If you are between sizes or unsure which size is right for you, please contact YAY Scuba before ordering. Proper sizing is important for comfort, mobility, and drysuit performance

Authorized Hollis Dealer

YAY Scuba is an authorized Hollis dealer. Hollis drysuits purchased from an authorized Hollis dealer are covered by the applicable Hollis manufacturer warranty. Hollis currently provides a 5-year warranty on drysuit construction and a 1-year warranty on zippers and valves, subject to the manufacturer's warranty terms and exclusions.

Why Buy from YAY Scuba

Shop with confidence from an authorized Hollis dealer. Your purchase includes the applicable Hollis manufacturer warranty and access to authorized dealer support and service.