Switory Parcel Bags 12x16 Inch Waterproof Mailing Bags, Self-Seal Poly Nylon (100 Pack) – White
Product description
If you post soft items regularly, a stack of reliable parcel bags can save a surprising amount of hassle. These Switory Parcel Bags are a 100-pack of 12x16 inch mailing bags with a self-sealing closure, designed for everyday posting like clothes and other non-breakable goods. They’re not trying to be “premium packaging”, but they do tick a lot of practical boxes for routine dispatch.
That said, you’ll want to be a bit realistic about what they are: poly/nylon mailers are mainly for protection against the usual bumps and weather during transit, not for replacing a proper box with padding everywhere.
At a glance
This pack gives you 100 mailing bags in a medium size (inner size 30.5cm x 39.5cm / 12x16 inch). They’re made from plastic and described as waterproof, with a self-seal adhesive closure that’s pressure sensitive and intended to provide a secure, easy-to-pack seal.

The material mix is worth noting: the listing describes heavy-duty nylon fibres in addition to polyethylene-style mailer construction. In plain terms, that’s aimed at giving you better tear/puncture resistance than the very flimsy bags people often get stuck with.
There’s also an opacity angle. The bags are white on the outside with a black inner lining, which the description says can look like a light grey shade rather than a bright white. That opaque design is meant to help with privacy and a more professional look when posting.
Key features
The headline features here are straightforward and very “shop-floor useful”:



- Self-sealing, no extra tape needed: the bags use an adhesive closure that’s pressure sensitive, described as durable and water- and dirt-resistant.
- Medium format for soft goods: the inner size (30.5cm x 39.5cm) makes them suitable for items such as T-shirts, blankets, scarves, or other non-breakable products.
- Made to survive handling: the description specifically calls out tear and puncture resistance, with the idea that the mailer material can withstand the shipping process.
- Waterproof and more weather-friendly: the closure and material are described as resistant to water and dirt.
- Privacy-friendly look: opaque construction with a contrasting inner lining helps keep contents from being clearly visible.
If you’ve ever had to re-pack because an adhesive tab didn’t feel trustworthy, this is the kind of “it should seal the first time” approach that suits high-frequency posting.
What to know before you buy
These parcel bags are designed for soft items, which means they come with limitations depending on what you sell. They don’t provide the same kind of interior cushioning you’d get from a rigid box, so you may need to add your own padding.

A practical micro-example: for a folded hoodie or a thick blanket, you can add a layer of newspaper or bubble wrap inside (the listing suggests newspaper or bubble wrap as extra protection) and then seal the bag. For flat T-shirts, padding might be minimal, for more delicate fabrics, you’ll likely want more.
Also, keep the “waterproof” claim in context. Mailing bags are usually about resisting moisture and light exposure, but nothing can fully substitute for smart packing if you’re sending something that must stay completely pristine.
Finally, the exterior colour isn’t described as a pure bright white. If you’re matching packaging aesthetics, that black inner lining might be worth remembering.
What stands out in everyday use



On paper, the biggest day-to-day benefit is speed. A 100-pack means less re-ordering for anyone posting frequently, and the self-sealing strip is built for quick close-and-go packing.
The second noticeable point is the material stance. Compared with very thin mailers, the listing says these have good thickness and resistance to tearing and puncturing. That matters if parcels get dragged around sorting centres or get knocked about before delivery.
And if confidentiality matters—either because you’re sending personal items or you just want less “see-through” packaging—opaque materials with a lined interior can be a small but real improvement over basic translucent bags.
Where it may not be a great match

It may not suit you if:
- you’re posting fragile, breakable items that truly need rigid protection and impact absorption
- you need a bag that offers significant cushioning by itself (these are described as flexible mailers rather than padded parcels)
- you’re very particular about exact colour appearance (the listing suggests it may not look like a bright true white)
In other words, it’s better viewed as a practical soft-goods solution rather than an all-purpose “protect anything” packaging replacement.
Tech summary



Tech specs: - Type: Mailing/parcel bags (poly nylon mailers) - Size: 12x16 inch (inner size 30.5cm x 39.5cm) - Pack size: 100 pcs - Colour: White outer surface with black inner lining
Is it worth it?
It’s worth buying if you post soft items regularly—clothes, folded textiles, and other non-breakables—and you want a self-sealing, waterproof-leaning mailer that focuses on speed and decent protection without the fuss of cartons. The 100-pack is also the sort of quantity that tends to work well when you’re dispatching often and don’t want to keep running out.
You may want to skip it if your parcels contain fragile goods that need proper cushioning built into the packaging, or if you need a consistently bright-white look for branding. For everything else in its intended lane, these Switory bags look like a sensible, functional everyday choice.
Mini FAQ
Are these parcel bags suitable for posting clothes? Yes. The listing specifically mentions soft items like T-shirts, blankets and scarves.
Do I need extra tape to seal them? No extra tape is implied, the bags are described as self-sealing with a pressure sensitive adhesive closure.
Do they come in a pack of 100? Yes, the product is described as a 100pcs pack.
Do they offer cushioning on their own? Not in the way a padded box would. The listing suggests adding padding such as newspaper or bubble wrap for extra protection.
Are they waterproof? They’re described as waterproof, with water- and dirt-resistant closure properties.
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