Sea to Summit Ultra-Sil Nano Daypack 20L vs Thule AllTrail 45L Hiking Backpack (2026)

✍️ By the 247Verdict Editorial Team📅 Updated 05 October 2026

Which is better? We compared both on score, owner ratings, pros and cons.

Sea to Summit Ultra-Sil Nano Daypack 20L

8.9/10 Great

4.5★ (3,600 owners)

68g packable, 20L, silnylon, rolls into pocket, 60kg load tested. The emergency daypack.

Full Review

Thule AllTrail 45L Hiking Backpack

8.9/10 Great

4.5★ (3,800 owners)

45L, ventilated back, hipbelt pockets, rain cover, accessible front opening. Scandinavian hiking pack.

Full Review

At a Glance

	Sea to Summit Ultra-Sil Nano Daypack 20L	Thule AllTrail 45L Hiking Backpack
247Verdict Score	8.9/10	8.9/10
Owner Rating	4.5★ (3,600)	4.5★ (3,800)
Verdict	Great	Great
Capacity	20L	45L

Quick Verdict

This is a genuine draw — both score within 0.15 points of each other. Sea to Summit Ultra-Sil Nano Daypack 20L: 68g packable, 20L, silnylon, rolls into pocket, 60kg load tested. The emergency daypack. Thule AllTrail 45L Hiking Backpack: 45L, ventilated back, hipbelt pockets, rain cover, accessible front opening. Scandinavian hiking pack. Choose based on your specific needs. Check the current price on Amazon →

Pros & Cons Side by Side

Sea to Summit Ultra-Sil Nano Daypack 20L

68g — the weight of a small apple in a pack that carries 20L of gear
Rolls into its own front pocket to the size of an orange — fits in any jacket pocket
Silnylon construction has 60kg load-tested strength despite the negligible weight
Doubles as summit pack, shopping bag and travel overflow — permanent carry 'just in case'
Sea to Summit's outdoor gear engineering heritage in their lightest packable pack

Hip belt absent — all load carried on shoulders limits comfortable carry to 5-6kg maximum
Silnylon squeaks when compressed in a main bag — audible in quiet environments
Single main compartment with minimal organisation — not practical for technical gear access

Thule AllTrail 45L Hiking Backpack

Ventilated back panel separates pack from spine for airflow on steep ascents
Large hipbelt pockets hold phone and snacks without removing the pack
Front U-opening allows full access to pack contents without unpacking from top
Integrated rain cover deployable without removing the pack
Thule's Scandinavian heritage in outdoor equipment design since 1942

45L is touring size — too large for day hiking, slightly too small for 5+ day expeditions
Hipbelt fit requires proper sizing — poorly fitted hipbelts are uncomfortable for long days
Premium pricing over Osprey Talon alternatives at similar capacity

FAQ

Which is better, Sea to Summit Ultra-Sil 20L or Thule AllTrail 45L Hiking?

Is the Sea to Summit Ultra-Sil 20L worth the extra cost?

The Thule AllTrail 45L Hiking Backpack matches or exceeds it at a potentially lower price point.

Who is the Sea to Summit Ultra-Sil 20L best suited to?

68g packable, 20L, silnylon, rolls into pocket, 60kg load tested. The emergency daypack.

Who is the Thule AllTrail 45L Hiking best suited to?

45L, ventilated back, hipbelt pockets, rain cover, accessible front opening. Scandinavian hiking pack.

What are the main downsides of each?

Sea to Summit Ultra-Sil Nano Daypack 20L: Hip belt absent — all load carried on shoulders limits comfortable carry to 5-6kg maximum; Silnylon squeaks when compressed in a main bag — audible in quiet environments. Thule AllTrail 45L Hiking Backpack: 45L is touring size — too large for day hiking, slightly too small for 5+ day expeditions; Hipbelt fit requires proper sizing — poorly fitted hipbelts are uncomfortable for long days.

Do owner ratings agree with our verdict?

Largely, yes — Sea to Summit Ultra-Sil Nano Daypack 20L sits at 4.5★ from 3,600 verified Amazon owners, and Thule AllTrail 45L Hiking Backpack at 4.5★ from 3,800.

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