Garmin Forerunner 165 GPS Running Watch vs Sea to Summit Ultra-Sil Nano Daypack 20L (2026)

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

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

Garmin Forerunner 165 GPS Running Watch

8.9/10 Great

4.5★ (6,100 owners)

Entry AMOLED Garmin with training readiness and 11-day battery. The beginner's serious GPS watch.

Full Review

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

At a Glance

	Garmin Forerunner 165 GPS Running Watch	Sea to Summit Ultra-Sil Nano Daypack 20L
247Verdict Score	8.9/10	8.9/10
Owner Rating	4.5★ (6,100)	4.5★ (3,600)
Verdict	Great	Great

Quick Verdict

This is a genuine draw — both score within 0.15 points of each other. Garmin Forerunner 165 GPS Running Watch: Entry AMOLED Garmin with training readiness and 11-day battery. The beginner's serious GPS watch. Sea to Summit Ultra-Sil Nano Daypack 20L: 68g packable, 20L, silnylon, rolls into pocket, 60kg load tested. The emergency daypack. Choose based on your specific needs. Check the current price on Amazon →

Pros & Cons Side by Side

Garmin Forerunner 165 GPS Running Watch

AMOLED display brings Garmin's best screen to the entry price point
Training Readiness score guides workout intensity without overwhelming beginners
11-day battery in smartwatch mode — matches the more expensive Forerunner 265
GPS accuracy from Garmin's trusted GNSS satellite support
Under £200 brings proper training analytics to budget-conscious runners

Single-band GPS (not dual-band like the 265) — less accurate on technical terrain
No HRV status measurement — only in the Forerunner 265+
Smaller feature set vs Forerunner 265 for structured workouts

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

FAQ

Which is better, Garmin Forerunner 165 GPS or Sea to Summit Ultra-Sil 20L?

Is the Garmin Forerunner 165 GPS worth the extra cost?

The Sea to Summit Ultra-Sil Nano Daypack 20L matches or exceeds it at a potentially lower price point.

Who is the Garmin Forerunner 165 GPS best suited to?

Entry AMOLED Garmin with training readiness and 11-day battery. The beginner's serious GPS watch.

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.

What are the main downsides of each?

Garmin Forerunner 165 GPS Running Watch: Single-band GPS (not dual-band like the 265) — less accurate on technical terrain; No HRV status measurement — only in the Forerunner 265+. 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.

Do owner ratings agree with our verdict?

Largely, yes — Garmin Forerunner 165 GPS Running Watch sits at 4.5★ from 6,100 verified Amazon owners, and Sea to Summit Ultra-Sil Nano Daypack 20L at 4.5★ from 3,600.

As an Amazon Associate we earn from qualifying purchases. Links below are affiliate links.