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Cilao OZ 37 Pro Front
  • Cilao OZ 37 Pro Front
  • Cilao OZ 37 Pro Back
  • Cilao OZ 37 Pro Weight Distribution
  • Cilao OZ 37 Pro Tie-In Point
  • Cilao OZ 37 Pro
  • Cilao OZ 37 Pro

OZ 37 Pro



My vote: None ( 4.4 avg )


Designed for mountaineering and high-level racing, the OZ 37 pro is the no-compromise harness. Its high density foam provides ergonomics and optimum comfort in suspension. It is suitable for intensive use.

French and European manufacture.

Harness without buckle (patent)

The ratio of lightness / resistance / comfort make them high-performance harnesses in suspension and when walking. They grant the user total freedom of movement and act as a double skin to the point of being forgotten. These ultralight and compact harnesses are so compact that they accompany you in all your races in the mountains for maximum safety.

Features  :

  • Harness without buckle: waist adjustment with hook and loop 
  • Unique tie-in point  with center guard,  protected against abrasion, UV and wear
  • Specific orange locator allowing carabiner or rope to work in the right direction
  • Elastic adjustment of the thighs, which allows the belt to be held in position and more comfort in movement
  • Elastic link thighs / belt detachable and sliding to have a balanced tension, greater freedom of movement and to be able to lower his pants while staying roped
  • High density foam and yellow 3D mesh for better comfort on the skin and good ventilation
  • Comes in a zipped pocket

Retail price

US$ 94.46
Price is a static conversion from
€85.00 EUR
Weight (g)


In grams, the weight, as stated by the manufacturer/brand.

If there are differences in weight (due to multiple sizes or optional accessories) we'll list them here.

The default weight is the middle-most size, often this is size M.

193 g

S : 183 g / 6.5 oz
M : 193 g / 6.8 oz
L : 208 g / 7.3 oz
XL : 219 g / 7.7 oz
XXL : 233 g / 8.2 oz
(weight converted from grams to ounces)

Gender Unisex
Sizes S, M, L, XL, XXL
Gear Loops

Number of Gear Loops

Gear loops are used to hold gear (quickdraws, cams, etc) onto your harness. 4 gear loops is most common.

0 - 1 Gear Loops

Most often on full body harnesses or guide/gym style harnesses.

2-3 Gear Loops

Mostly found on lighter harnesses made for [ski] mountaineering or high-end sport climbing where weight is a high priority.

4 - 5 Gear Loops

The standard/most common number for climbing harnesses. Perfect for sport and trad.

More Than 6 Gear Loops

Designed for long multi-pitch and big wall climbing, found on harnesses made to hold the maximum amount of gear.

Worth Considering

Occasionally, the number of gear loops will change on a harness model depending on the size. There could be 7 gear loops for the med/large but only 5 gear loops for the xsmall/small. In this case we list the highest number for the filters, and then write an explanation on the product page like, “Size S/XS can only fit 5 gear loops.”

4 Gear loops
Ice Clip Slots

Ice Clip Slot

Ice clipper slots are made to fit a carabiner that holds ice screws. These slots are generally only used by ice climbers but there is no disadvantage to having them on your harness.

Less than 40% of harnesses will have ice clipper slots. And those harnesses will usually have 2 or 4 slots, often located next to, or between, the gear loops.

Yes, 1
Belay / Tie-In Tie-In
Waist Buckle Type None
Leg Buckle Type None (it stretches)
Drop Seat Yes
Haul Loop

Haul Loop

Trad climbers often look for a haul loop as they're intended to haul a rope (second line) or pack (while you climb the chimney).

A haul loop can also hold shoes or other accessories. Although not the intended use, it is also commonly used to hold a chalk bag.

No  (0kN)
Certification CE, EN, UIAA
Size Chart

Waist : 73-83 cm / 28.7-32.7 in
Legs : 51-57 cm / 20.1-22.4 in
Max Hip : 89 cm / 35 in
Waist : 76-86 cm / 30-33.9 in
Legs : 55-61 cm / 21.7-24 in
Max Hip : 94 cm / 37 in
Waist : 80-90 cm / 31.5-35.4 in
Legs : 59-65 cm / 23.2-25.6 in
Max Hip : 99 cm / 39 in
Waist : 85-95 cm / 33.5-37.4 in
Legs : 64-70 cm / 25.2-27.6 in
Max Hip : 105 cm / 41.3 in
Waist : 90-100 cm / 35.4-39.4 in
Legs : 69-75 cm / 27.2-29.5 in
Max Hip : 111 cm / 43.7 in
(we converted centimeters to inches)

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The UIAA equipment standard provides a baseline for equipment performance in a test lab under controlled conditions on new equipment. Although these test conditions are relevant to the conditions encountered climbing, conditions encountered at the crags and the condition of the equipment are equally important. This recommendation from the UIAA member federation The British Mountaineering Council (BMC) provides vital equipment information that is NOT explicitly addressed in the standard, particularly failure modes of the equipment and recommendations for the use, inspection, maintenance, and retirement of equipment.