Salomon
Salomon Soft Flask 500 mL Ultra 42
- Weight for its size: 9/10 How much it adds to your pack for the water it holds.
- Packed size (empty): 8/10 How much room it takes up when it is empty, for the water it holds.
Running vests, belts and hand carry where a tilted 500 mL flask sits flat on the chest
- Type
- Soft
- Capacity
- 0.5 L
- Weight
- 38 g
Packed size 30 x 9 x 5 cm Compare with a 2-litre bottle
About as long as a 2-litre bottle and about as wide as one. Drawn to scale.
Where to buy
Trekitt £25 In stock. Delivery £3.99. Free next-day delivery over £65.
View at shop: TrekittSalomon £25 In stock. Salomon's UK shop. Standard delivery is £5 and free for members; its help article gives £60 and £100 as the free-delivery line.
View at shop: SalomonPrices checked 2 Nov 2026 to 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 for its size
From maker's figures 9/10How much it adds to your pack for the water it holds. 9: Among the best you can buy for this.
Salomon UK lists 38 g for 500 mL: 76 g per litre, under 100 g/L. Trekitt lists 38 g too. Salomon's US page gives its weight only in rounded ounces (about 28 g) and MEC (Canada) lists 33 g; both would also band 5, so the band does not depend on which figure is right.
Packed size (empty)
Estimate from maker's specs: soft bottle: rolls up when empty 8/10How much room it takes up when it is empty, for the water it holds. 8: Clearly better than most.
Estimate from maker's specs
In short
Good for
- Running vests, belts and hand carry where a tilted 500 mL flask sits flat on the chest
- A light flask with a wide 42 mm opening for refills from streams (Trekitt)
- Fast hiking and fastpacking days with refills from streams
Strengths
- 38 g for 500 mL: 76 g per litre
- Tilted shape made to sit close to the body (Salomon)
- 42 mm opening for fast filling and cleaning, and for ice (Trekitt)
- High-flow valve and angled cap for quick sips (Trekitt)
- RF-welded seams, and BPA, BPS, BPF and PFC free (Trekitt, from Salomon's specs)
Weaknesses
- Salomon gives only a width, and no rolled-up size, so we cannot score packed size
- Shops list different weights (38 g, 33 g), though all band the same
- No independent test found, so ease of use and durability are estimates, not reviewed scores
Sources
We haven't tested this ourselves. Every score comes from these specs, tests and reviews.