This cosy hat is completely reversible thanks to clever double-knitting.

The Peaks and Troughs Hat is the tenth project in Boost Your Knitting, a programme to help you grow your knitting skills.

SIZE
Small (Medium, Large)
To fit head circumference: 40–47 (47–53, 53–60) cm [15¾–18½ (18½–20¾, 20¾–23½) in]
Approx. finished circumference: 41 (47, 53) cm [16¼ (18½, 20¾) in] (both inner and outer layers of fabric should have this circumference if worked at the correct tension, but in reality the outer layer will be slightly more stretched making it a little larger)
Depth from brim to crown: 19 (21.5, 21.5) cm [7½ (8½, 8½) in]

YARN
Arnall-Culliford Knitwear Something to Knit With Aran (aran weight; 70% highland wool, 30% superfine alpaca; 82m per 50g skein)
Yarn A: Cornflower; 1 x 50g skein in all sizes
Yarn B: Pool; 1 x 50g skein in all sizes
Yarn C: Sky; 1 x 50g skein in all sizes

NEEDLES AND NOTIONS
1 set 4.5mm [US 7] circular needles, 100cm [40in] long, for working hat in magic loop method, or your preferred needles for working medium and small circumferences in the round, or needle size required to match tension
Stitch markers
Tapestry needle

TENSION
17 sts and 24 rounds to 10cm [4in] over double-knitted stocking stitch in the round, after washing and blocking

PATTERN NOTES
Please take your time to read through the tutorial before casting on.
The hat is cast on using the two-colour alternating long-tail cast-on method, the charted pattern is then worked in the double-knitting method throughout the hat, before fastening off at the crown.
To adjust the depth of your hat, you can work extra (or fewer) repeats of charts A–C. You will simply need to change the colours used in the crown shaping so that your zigzag pattern remains correct.

SPECIAL TECHNIQUES
Photo tutorials for the following techniques can be found within this book:
Double-knitting
Right-leaning, single-pair decrease
Weaving in ends in double-knitting

Photo tutorials for the following techniques can be found in
the ebook file, Extras: December:
Two-colour alternating long-tail cast-on method

The following video tutorials can be found on our website at
www.acknitwear.co.uk/boost-your-knitting
Double-knitting (including weaving in ends)
Two-colour alternating long-tail cast-on method
Right-leaning, single-pair decrease for double-knitting