Rab
Rab Men's Sonic Long Sleeve Zip (Dryflo Air, Beluga)
- Weight: 10/10 How much it adds to your pack.
- Warmth: 1/10 How much the fabric insulates next to your skin. Heavier fabric is warmer and slower to dry.
Hot or high-effort days: mountain running, fast hiking and scrambling, where it is meant to dry fast and vent
- Weight
- 131 g (M)
- Fabric weight
- 85 g/m²
- Fibre
- Synthetic
- Merino
- 0%
Where to buy
Rab £42 In stock. Free delivery. Beluga, size M in stock. Free UK delivery (its banner).
View at shop: RabTiso £42 In stock. Delivery £3.99. Beluga, sizes S to XXL listed in stock including M. Free delivery over £50.
View at shop: TisoPrices checked 8 Nov 2026 on each shop's own page; shops can change them. We earn no commission on these links; shops are listed by price. More
Our ratings (out of 10)
1 to 10, compared with the whole market. Each says what it's based on. How we score
Weight
From maker's figures 10/10How much it adds to your pack. 10: The best you can buy for this.
Rab's page gives 131 g for size M. 131 g is under 160 g, the 5 band.
Warmth
From maker's figures 1/10How much the fabric insulates next to your skin. Heavier fabric is warmer and slower to dry. 1: A real weak point.
Rab gives the main fabric at 85 g/m². 85 g/m² is under 110 g/m², the 1 band. It is a summer-weight fabric by design.
In short
Good for
- Hot or high-effort days: mountain running, fast hiking and scrambling, where it is meant to dry fast and vent
- Sun cover on summer wild camps, with the chest zip open for airflow
- Packing light on multi-day trips, at 131 g
Strengths
- 131 g in size M, per Rab
- 85 g/m² fabric: very light and thin
- Deep chest zip for venting, raglan sleeves and hidden thumb loops, per Rab
Weaknesses
- 85 g/m² fabric gives very little warmth (score 1), so it is not a cold-weather base layer
- Rab's page gives no fibre percentages: Tiso lists 100% polyester and calls the fabric Motiv Aero, while Rab calls it Dryflo Air; the barcodes match
- No independent hands-on test found, so comfort, odour and durability are estimates, not reviewed scores
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.