US
WATERFLY

WATERFLY Packable Sling Backpack

  • Storage Volume: 0.2 cu ft
  • Size: Small
  • Item Weight: 0.55 pounds
  • Strap Type: Cross-Body

Last refreshed Sep 9, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.

Our verdict

A foldable crossbody sling for daily essentials, not the hiking pack its category label suggests.

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ASIN: B08CBTRYY4Model: XB-E01Category: Hiking Daypacks

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Overview

This is a small, packable sling bag that folds into its own zip pouch, sized between a fanny pack and a full backpack. Despite the hiking daypack category it is filed under, the listing describes it as a crossbody daypack for a wallet, phone and small tablet rather than overnight hiking gear.

The category label on this listing points to hiking daypacks, but the actual dimensions, about 14.6 x 7.8 x 3.5 inches expanded, and the seller's own description of it as bigger than a fanny pack but smaller than a backpack say otherwise. Treat it as a foldable everyday crossbody bag rather than a pack meant to carry trail gear.

  • Folds down to about 7 x 4 x 2.6 inches
  • Reversible strap adjustable up to 43 inches
  • Water-resistant polyester with SBS zippers
  • Breathable mesh padded back panel

Who it's for

Someone who wants a light bag for a phone, wallet and small essentials that folds flat into a suitcase or larger bag when not in use. Not a fit for anyone needing real hiking pack capacity for water, layers or trail gear.

Pros and cons

Pros
  • Folds flat into its own pouch for storage
  • Reversible strap wears on either shoulder
  • Water-resistant polyester with SBS zippers
Cons
  • No buyer review data included with this listing
  • Small capacity despite the hiking daypack category label

Performance notes

The bag folds into its own interior zip pouch, shrinking from roughly 14.6 x 7.8 x 3.5 inches down to about 7 x 4 x 2.6 inches for storage. The strap is reversible using D-rings on either side so it can sit across the left or right shoulder, and a mesh padded back panel is meant to keep it from feeling stiff against the body.

Specifications

BrandWATERFLY
ModelXB-E01
Dimensions & fit
SizeSmall
Item Weight0.55 pounds
Backpack Harness SizeAdjustable
Apparel Fabric Weight ClassLightweight
Fit to Size SentimentPositive
Item Dimensions D x W x H14.5 × 7.9 × 3.5 inches
Compatible Device Size Maximum12 inches
Capacity & performance
Storage Volume0.2 cu ft
Age Range DescriptionAdult
Construction & materials
Outer MaterialPolyester
Material TypePolyester
Fabric TypePolyester
Apparel Fabric StretchNo Stretch
ColorBlack
Shell TypeSoft Shell
Included components
Backpack DesignDaypack Backpack
Backpack Harness TypeShoulder Harness
Unit Count1
Other details
Strap TypeCross-Body
Water Resistance LevelWater Resistant
Fit Typeadjustable
Number of Compartments1
Number Of Pockets2
Apparel Closure TypeZipper
Lining DescriptionPolyester
Item ShapeRectangular
School TypeHigh School
Sport TypeHiking
Number of Items1
Import DesignationImported
PatternSolid
Product StyleSling Backpacks
Product Care InstructionsHand Wash Only
Recommended Uses For ProductTravel
Style NumberXB-E
Subject CharacterSports
Embellishment FeaturePlush Accent
Other Special Features of the ProductLightweight

Closest rivals on specs

EVANCARY Mini Sling Backpack Crossbody Bag
  • Item Weight 0.55 vs 0.44 pounds (+25%)
  • Storage Volume 0.2 vs 0.5 cu ft (-60%)
BECOJADDE Foldable Packable Hiking Daypack 15L
  • Item Weight 0.55 vs 0.68 pounds (-19%)
  • Storage Volume 0.2 vs 0.5 cu ft (-60%)
AMJ Crossbody Sling Bag Chest Daypack
  • Storage Volume 0.2 vs 0.6 cu ft (-67%)
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Frequently asked questions

Is the WATERFLY sling bag actually a hiking backpack?

No, despite the category it is listed under, the seller describes it as sized between a fanny pack and a full backpack, meant for a wallet, phone and small items rather than hiking gear.

Does the WATERFLY sling bag fold up for storage?

Yes, it folds into its own interior zip pouch down to roughly 7 x 4 x 2.6 inches.

Can the strap be worn on either shoulder?

Yes, the strap uses 3D rings on the lower part so it can connect to either the left or right D-ring.