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Stansport 503-B Pack Lite foam pad review

The thinnest and lightest mat in this group — three eighths of an inch and 272 grams of closed-cell foam — published in five short bullets with no R-value at all.

On the maker’s own page

A Pack Lite camping and backpacking sleeping pad in lightweight closed-cell foam, waterproof and puncture-proof, with straps included.

Stansport states a lightweight pad made of closed-cell foam insulation, measuring 72 by 19 by 3/8 inches, designed to keep cold and dampness away from the body, with straps to keep the pad rolled for storage and transit, and a one-year warranty against manufacturer defects.

No R-value. No standard. No packed size. No weight.

No R-value, and still a use

The sum, not the figure.

This shelf’s introduction explains why thin closed-cell foam still exists: R-value adds up, so a foam mat under an inflatable one gives you the sum.

Three eighths of an inch under a 2 R-value air mat is a warmer bed than the air mat alone, and it is also the layer that stops a sharp stone reaching the inflatable.

What the listing does not do is say how much it adds. Five of the eight mats in this group publish an R-value; three do not.

Nineteen inches

The narrowest mat in this group.

The others run 20, 20, 23.6, 24, 25, 25.2 and 27 inches. Forty-eight centimeters is shoulder width for a slim adult lying still.

This shelf’s buying tip: buy the widest one your pack tolerates, because shoulders and elbows off the edge undo the rating.

As a bottom layer it matters less, because the mat above is wider. Alone, it is the figure to measure against your own shoulders.

Nothing to go flat

The third kind of mat.

Air mats are light and noisy. Self-inflating mats are heavier and quieter. Closed-cell foam never punctures and never packs small — this shelf’s introduction’s own three-way split.

No valve, no pump, no repair kit. Straps hold a roll rather than a sack holding a bundle.

Stansport’s instructions carry the use. Nothing here replaces them, and nothing on this page describes any product as safe.

Availability

The American Amazon store was listing it at about $22 at the time of writing.

Every figure here is what Keepa held on the day this page was last revised. Offers and prices shift without warning.

Prices quoted in this text were read on October 8, 2026. The live price is at the top of the page.

What it does well, and where it gives way

Strengths

  • The lightest mat in this group at about 272 g (9.6 oz)
  • Publishes all three of its dimensions in one line: 72 by 19 by 3/8 inches
  • Closed-cell foam, which this shelf's introduction says never punctures
  • Straps supplied to keep the roll closed in transit
  • Stated waterproof and puncture-proof
  • A one-year warranty against manufacturing defects
  • Among the lowest prices in this group

Compromises

  • No R-value published, which is the one decisive figure on this shelf
  • Nineteen inches is the narrowest mat here, and this shelf's buying tip says shoulders off the edge undo the rating
  • Three eighths of an inch will not keep a side sleeper’s hip off the ground alone
  • No packed size published, only that straps are included
  • Five bullets, of which one is a warranty
  • No face fabric, so nothing protects the foam from grit

Specifications

R-valueNot published
Standard quotedNone — as on all eight mats in this group
Thickness3/8 inch — about 10 mm (0.39 in), the thinnest in this group
Packed sizeNot published. Straps are supplied to keep the pad rolled
WeightNot published. The shipping weight is about 272 g (9.6 oz), the lightest in this group
Width19 inches — about 48 cm (18.9 in), the narrowest in this group
Length72 inches — about 183 cm (72 in)
Fabric denierNot applicable — bare closed-cell foam, with no face fabric
Inflation methodNone. Closed-cell foam, stated puncture-proof
Amazon referenceB00069PFKK
EAN0011319476707

What people ask before buying

Does a mat with no R-value have a use?

Yes, and this shelf's introduction names it: R-value adds up, so a foam mat under an inflatable one gives you the sum — which is why the thin closed-cell mat still exists. Three eighths of an inch of closed-cell foam under a 2 R-value air mat is a warmer bed than the air mat alone, and it is also the layer that stops a sharp stone reaching the inflatable. What the listing does not do is let you work out how much it adds, because no figure is published for it. Of the eight mats in this group, five publish an R-value and three do not.

How narrow is nineteen inches?

Narrower than everything else in this group, which runs from 20 to 27 inches. Forty-eight centimeters is shoulder width for a slim adult lying still, and this shelf's buying tip is blunt about the consequence: shoulders and elbows off the edge of a narrow mat undo the rating. On a mat used as a bottom layer that matters less, because the mat above it is wider; used alone it is the figure to measure against your own shoulders before ordering.

Why does puncture-proof matter?

Because the alternative fails in one event. An inflatable mat loses everything to one thorn, and this shelf's introduction sets out the trade plainly: air mats are light and noisy, self-inflating mats are heavier and quieter, closed-cell foam never punctures and never packs small. This mat is the third kind. It cannot go flat, it does not need a valve, a pump or a repair kit, and it will not pack down — the straps hold a roll rather than a stuff sack holding a bundle.

Against the rest of the camping gear

Close prices, same category: comparable camping gear. We keep only the specifications all of them publish, because a column with gaps compares nothing.

Model Price R-valueStandard quotedThicknessPacked size
Stansport 503-B Pack Lite foam pad $22 Not publishedNone — as on all eight mats in this group3/8 inch — about 10 mm (0.39 in), the thinnest in this groupNot published. Straps are supplied to keep the pad rolled
Wakeman 75-CMP1009 foam pad $22 Not publishedNonePublished four times and inconsistently: 0.5 inch in the title, and 1 inch in the first bullet, the product details line and the descriptionRolled: 24 × 7 × 7 in — published
fitply Folding XPE foam pad $25 Published as an insulation rating of 2.1None. The listing states only that the pad "has been tested to standard" — the hedge this shelf's introduction warns about0.36 inch — about 9 mm (0.35 in)Folded to 23.6 × 5.6 × 4.9 in
FUN PAC 01 mat with pillow $30 Not publishedNonePublished twice and differently in the same bullet: the heading reads 3" thick, and the text gives dimensions of 78 × 27 × 8 inchesNot published. Stated to be weighed and sized "only like a water bottle"

What separates the models, in camping gear

  • If price decides: this model, at $22.

The buyer this one serves, among camping gear

A layer under an inflatable mat, or the lightest possible barrier against damp

What buyers actually choose

Amazon reports what buyers took in the month before this page was last checked: at least 100.

The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.

Sources

Specifications: the manufacturer sheet for camping and hiking gear and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

What we look at on this camping gear