Mares Ultraskin Long Sleeve Rash Guard - Mens
In stock — ships from Irvine, CA
This item is currently on backorder. Order now to reserve yours, and we will ship it as soon as it is back in stock.
Mares Ultraskin Long Sleeve Rash Guard - Mens - S (Small) is backordered and will ship as soon as it is back in stock.
Pickup available at In Store
Usually ready in 2 hours
Mares rash guard sizing. Imperial in bold, metric underneath.
Man
Height
| Size | Height ft/in · cm |
|---|---|
| S |
5′7″–5′10″ 170.5–178 |
| M |
5′8″–5′11″ 173–180.5 |
| L |
5′9″–6′0″ 175.5–183 |
| XL |
5′10″–6′1″ 178–185.5 |
| 2XL |
5′11″–6′2″ 180.5–188 |
| 3XL |
6′0″–6′3″ 183–190.5 |
Chest, waist, hips and thigh
| Size | Chest in · cm |
Waist in · cm |
Hips in · cm |
Thigh in · cm |
|---|---|---|---|---|
| S |
38.2 97 |
34.6 88 |
39.4 100 |
20.1 51 |
| M |
40.9 104 |
37.4 95 |
42.1 107 |
20.9 53 |
| L |
43.3 110 |
39.8 101 |
44.5 113 |
22 56 |
| XL |
45.7 116 |
42.1 107 |
46.8 119 |
23.2 59 |
| 2XL |
48 122 |
44.5 113 |
49.2 125 |
24.4 62 |
| 3XL |
50.4 128 |
46.8 119 |
51.6 131 |
25.6 65 |
Woman
Height
| Size | Height ft/in · cm |
|---|---|
| XS |
5′0″–5′3″ 152.5–160 |
| S |
5′2″–5′5″ 157.5–165 |
| M |
5′4″–5′7″ 162.5–170 |
| L |
5′6″–5′9″ 167.5–175.5 |
| XL |
5′8″–5′11″ 172.5–180.5 |
| 2XL |
5′10″–6′1″ 177.5–185.5 |
| 3XL |
6′0″–6′3″ 183–190.5 |
Chest, waist, hips and thigh
| Size | Chest in · cm |
Waist in · cm |
Hips in · cm |
Thigh in · cm |
|---|---|---|---|---|
| XS |
34.6 88 |
26.7 68 |
37.7 96 |
19.3 49 |
| S |
37 94 |
29.1 74 |
40.1 102 |
20.5 52 |
| M |
39.4 100 |
31.5 80 |
42.9 109 |
21.6 55 |
| L |
41.7 106 |
33.8 86 |
44.9 114 |
22.4 57 |
| XL |
44.1 112 |
36.6 93 |
47.6 121 |
23.6 60 |
| 2XL |
47 119 |
39 99 |
50 127 |
24 62 |
| 3XL |
49.2 125 |
41.3 105 |
52.4 133 |
25.6 65 |
Source: Mares’s current size chart.
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Product Information
The Mares Ultraskin Long Sleeve Rash Guard is a men's diving undersuit built with Ultraskin technology, designed to be worn beneath wetsuits and dry suits for added thermal protection or on its own as a water sports top with UPF 50+ sun protection. It uses a three-layer construction that balances warmth, moisture management and freedom of movement.
Who it is for
This undersuit suits male divers who want a low-bulk base layer under a wetsuit or dry suit for extra warmth and reduced chafing, as well as anyone in other water sports who wants UPF 50+ sun coverage and light friction protection.
Key details
- Three-layer Ultraskin construction: a soft fleece interior, a breathable windproof membrane, and an elastic outer layer for a secure, unrestricted fit.
- UPF 50+ sun protection for defense against UV exposure during surface intervals and water sports.
- Light friction protection and moisture management for comfort during extended wear.
- Men's fit, available in sizes S, M, L, XL, 2XL and 3XL.
Compatibility and sizing
The Ultraskin Long Sleeve is compatible as a layering piece under wetsuits and dry suits, and it is offered in men's sizes S through 3XL to fit a range of body types.
DiveCatalog.com is an authorized Mares dealer and a dive shop in Irvine, California, serving divers since 2003. Call 888-701-4017 or start a chat if you need help choosing the right size or confirming fit under your wetsuit or dry suit.
- Three-layer Ultraskin construction: fleece interior, breathable windproof membrane, and elastic outer layer for a secure, unrestricted fit.
- Thermal protection for scuba and diving: ideal as a base layer under wetsuits or dry suits, with low bulk and excellent layering.
- UPF 50+ sun protection: shields skin during surface time and sunny water sports.
- Moisture management and comfort: quick-drying, reduced friction, and smooth layering under additional gear.
- Durable, easy-care fabric for diving gear: built for regular use and travel with minimal maintenance.
- Men's fit and versatility: designed for adult male sizing to work with typical scuba and diving setups.
- Compatible as a layering piece: works beneath wetsuits and dry suits for added warmth.
- Multi-activity use: suitable for diving as well as other water sports thanks to its friction-resistant, sun-protective design.
| Brand | Mares |
| Model | Ultraskin Long Sleeve |
| Fit | Men's |
| Construction | Three-layer Ultraskin |
| Inner Layer | Fleece |
| Middle Layer | Breathable windproof membrane |
| Outer Layer | Elastic |
| Sun Protection | UPF 50+ |
| Use | Standalone rash guard or base layer under a wetsuit or dry suit |
| Compatibility | Wetsuits, dry suits |
| Available Sizes | S, M, L, XL, 2XL, 3XL |
⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Frequently Asked Questions
What sizes does the Mares Ultraskin Long Sleeve Rash Guard come in?
It is available in men's sizes S, M, L, XL, 2XL and 3XL.
Can I wear the Ultraskin Long Sleeve without a wetsuit?
Yes. It works as a standalone top for water sports, offering UPF 50+ sun protection and light friction resistance.
Will the Ultraskin undersuit work under both wetsuits and dry suits?
Yes, it is designed to be worn beneath both wetsuits and dry suits as a thermal base layer, adding warmth without excess bulk thanks to its three-layer fleece, windproof membrane and elastic outer construction.
Does the Ultraskin Long Sleeve help with chafing from dive gear?
Yes. It offers light friction protection, which helps reduce chafing when worn as a layer under scuba equipment.












