Chicken Tramper Ultralight Gear 4L Fanny Pack Review

Overview

Chicken Tramper Ultralight Gear (CTUG) is a small Michigan-based cottage brand born out of a PCT thru-hike. The founders — two engineering graduates — designed their own gear on trail in 2018 and turned it into a business. The 4L Fanny Pack is their largest hip pack option, built from the same X-Pac VX-21 shell used across all their products. At 68g (2.4 oz) it sits squarely in ultralight territory and serves hikers who want meaningful front-access storage: snacks, a filter, a rain layer, a phone — all within arm’s reach without stopping to dig into a main pack.

Key Specs

Spec	Detail
Weight	68g (2.4 oz)
Volume	4L
Material	X-Pac VX-21
Back Panel	3D Spacer Mesh
Zipper	YKK Water Resistant #5 Uretek
Water Resistance	Water resistant (seams not sealed; not waterproof)
Interior Pocket	Lycra 4-way stretch mesh
Strap Length	~55 in. (adjustable; crossbody-capable)
Customization	169 possible two-color combinations
Comparison	See how CTUG 4L Fanny Pack compares to similar gear

Performance

Material & Durability

X-Pac VX-21 is the backbone of every CTUG product, and for good reason. Made by Dimension Polyant — a world leader in sailcloth manufacturing — X-Pac is 100% waterproof and designed to withstand the kind of environmental and physical forces encountered on the high seas, all while maintaining a high strength-to-weight ratio. On trail, that translates to real abrasion resistance: field testing by one reviewer involved dragging the pack across volcanic rock on Mt. Adams, and the X-Pac held up without complaint. The material is also notably easy to keep clean — dirt hides well, and grit shakes right out rather than collecting on the inside.

Water Resistance

This is the nuance that matters most: CTUG uses waterproof X-Pac and a water-resistant zipper, but does not seal the seams — so the pack is water resistant, not waterproof. Customers report it holds up well under light to medium rain. One reviewer ran a direct test on the smaller 1L version: they stuffed toilet paper inside, zipped it up, and held it under a running faucet for several minutes — the TP stayed bone-dry. That said, no one should fully trust unsealed seams through multiple days of bucketing rain — but it’s meaningfully better protection than a pants pocket or the minimal resistance of most hipbelt pockets. For sensitive items in a genuine downpour, a small dry bag liner is cheap insurance.

Comfort & Fit

X-Pac alone would feel a bit like thin flexible plastic against the body, which is why CTUG uses 3D spacer mesh for the back panel — the same material you know from your backpack’s shoulder straps, soft, squishy, and moisture-wicking.

Reviewers of the smaller sizes consistently confirm the difference is real:

the 3D spacer mesh adds meaningful cushioning at the hips, and the improvement over fanny packs without it is noticeable.

The 1-inch webbing strap can dig in slightly at first when worn simultaneously with a backpack hipbelt, but this tends to disappear after a few minutes, and users report being comfortable all day while carrying a full pack.

The 4L Sweet Spot (and Trade-offs)

The 4L is CTUG’s largest size — and they’re honest about who it’s for. Most long-distance hikers are happy with the 1L or 2.5L; the 4L is for those who want to take just about everything but the kitchen sink. That’s both the pitch and the caveat. At this volume, you can carry snacks, a water filter, a phone, a headlamp, a light puffy, and small camp sundries — all on your front. The risk is over-stuffing and ending up with a noticeable bounce. The 55-inch strap helps keep things snug, and the tapered design of the CTUG line puts more front-to-back depth at the top for easier access. The strap can also be extended to wear the pack as a crossbody bag — genuinely useful in town on zero days.

Integration with CTUG Backpacks

If you’re running a CTUG framed pack, the fanny pack integrates neatly: daisy chains sewn to the hipbelt let you hang the fanny pack from the front of the pack instead of looping it around your waist, which is more comfortable and convenient while hiking or in town. The fanny pack also stays attached to the main pack when you unbuckle one side, making it very easy to reattach. It works fine with any pack that has webbing or gear loops to clip to, though.

Interior Organization

The interior Lycra 4-way stretch mesh pocket is the one internal organizer. This pocket is large enough to fit a phone and keep it secure. That’s it for pockets — which keeps weight down but won’t satisfy hikers who like to micro-organize. At 4L, you’re fitting a meaningful amount of gear into one main compartment, so if you like everything sorted and grabbable in seconds, the lack of additional pockets will feel limiting.

Pros & Cons

Pros

• Genuinely ultralight at 68g (2.4 oz) for a 4L pack
• X-Pac VX-21 is tough — survives abrasion that would wreck cheaper fabrics
• 3D spacer mesh back panel makes a real difference in all-day comfort
• YKK Uretek zipper handles light to moderate rain well in practice
• 55-inch strap doubles as a crossbody; can clip to CTUG hipbelt daisy chains
• 169 color combinations available for made-to-order versions
• Dirt shakes out easily; low-maintenance in the field

Cons

• Seams are not sealed — not a true waterproof option in a sustained downpour
• At 4L, it’s easy to overload and create bounce on the trail
• Only one interior pocket; organization relies on how you pack, not the pack’s structure
• Made-to-order lead times can run 1–3 months (stock colors ship faster)
• Limited direct reviews of the 4L size specifically; most user data comes from the 1L and 2.5L variants

Who Should Buy This

The CTUG 4L Fanny Pack is best suited to thru-hikers and long-distance backpackers who carry a hipbelt-free frameless pack and want front-access storage in place of hipbelt pockets — or anyone who has tried a 1L or 2.5L fanny pack and keeps running out of room. It also makes a capable travel companion: light enough to forget about, tough enough to not baby, and customizable enough to not look like an afterthought. If you’re a minimalist who rarely needs more than a phone, some snacks, and a filter on your front, the 2.5L is probably the smarter size. The 4L is for those who want the option to carry a bit more — a layer, a camera, a larger lunch — without committing to a dedicated daypack.

Verdict

At 68g and built from legitimate sailcloth-grade X-Pac, the CTUG 4L Fanny Pack punches well above its weight class. It’s a durable, thoughtfully made piece of cottage-industry kit that handles daily trail abuse and light rain with ease — just don’t expect it to double as a dry bag in a genuine storm. If the 4L volume matches your actual needs, this is one of the most compelling ultralight hip packs available from a small brand that knows what thru-hikers actually want. Rating: 8/10.