Part 1
Begin crocheting from the top to bottom.
Make a foundation chain of 104 chains to work 14 repeats (one repeat is 8 chs) or 116 chains to work 20 repeats (one repeat is 6 chs).

1st row – h4ch, trc2 into 1ch, trc to 1 last ch; trc3 into 1ch + RC3

2nd row (one repeat is 8 chs) – h4ch, trc2 into 1ch, [ch1, sk2, shell1, ch1, sk2, trc dec1] to last 7 chs; ch1, sk2, shell1, ch1, sk2, trc2 into 1ch, trc1 + RC3
2nd row (one repeat is 6 chs) – h4ch, trc2 into 1ch, ch1, sk2, [shell1, ch1, sk1, trc dec1, ch1, sk1] to last 5 chs; shell1, ch1, sk2, trc2 into 1ch, trc1 + RC3

3rd row – h4ch, trc3, ch1, sk1, trc2, Vst1 under ch, trc2, [ch1, sk1, trc1, ch1, sk1, trc2, Vst1 under ch, trc2] to last 4chs; ch1, sk1, trc1, trc2 into 1ch, trc1 + RC3

4th row - h4ch, trc4, ch1, sk1, trc3, Vst1 under ch, trc3, [ch1, sk3, trc3, Vst1 under ch, trc3] to last 5chs; ch1, sk1, trc2, trc2 into 1ch, trc1 + RC3

5th row - h4ch, trc5, [ch1, sk1, trc4, Vst1 under ch, trc4] to last 6chs; ch1, sk1, trc3, trc2 into 1ch, trc1 + RC3

6th row - h4ch, trc6, [ch1, sk1, trc5, Vst1 under ch, trc5] to last 7chs; ch1, sk1, trc4, trc2 into 1ch, trc1 + RC3

7th row - h4ch, trc7, [ch1, sk1, trc6, Vst1 under ch, trc6] to last 8chs; ch1, sk1, trc5, trc2 into 1ch, trc1 + RC3

Part 2
Join front and back parts together.
Use a larger size crochet hook.
8th row – h4ch, trc1, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 under ch] x 2, ch15, skip 3 shoulder repeats, trc3 under ch, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 under ch] x 4, ch15, skip 3 shoulder repeats, [trc3 under ch, trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch] x 2, trc2 under chs + RC1
8th row (one repeat is 6 chs) – h4ch, trc1, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 under ch] x 3, ch15, skip 4 shoulder repeats, trc3 under ch, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 under ch] x 6, ch15, skip 3 shoulder repeats, [trc3 under ch, trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch] x 3, trc2 under chs + RC1

9th row – [sc to 15chs; sl.st.15] x 2, sc to end + RC3

10th row – h4ch, trc1, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 into 1ch] x 2, trc2 into 1ch, sk3, sl.st.1 into 4th ch, sl.st.8, sk3, trc2 into 1ch, trc3 into 1ch, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 into 1ch] x 4, trc2 into 1ch, sk3, sl.st.1 into 4th ch, sl.st.8, sk3, trc2 into 1ch, [trc3 into 1ch, trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch] x 2, trc2 under chs + RC1
10th row (one repeat is 6 chs) – h4ch, trc1, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 into 1ch] x 3, trc2 into 1ch, sk3, sl.st.1 into 4th ch, sl.st.8, sk3, trc2 into 1ch, trc3 into 1ch, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 into 1ch] x 6, trc2 into 1ch, sk3, sl.st.1 into 4th ch, sl.st.8, sk3, trc2 into 1ch, [trc3 into 1ch, trc3 into 1ch, ch1, sk1, (trc1, sk1) x3, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch] x 2, trc2 under chs + RC1

11th row – sc to end + RC3

12th row - h4ch, trc1, [trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc3 into 1ch] to one last repeat; trc3 into 1ch, ch1, sk1, (trc1, sk1) x2, trc dec1, sk1, (trc1, sk1) x 2, ch1, trc3 into 1ch, trc2 under chs + RC1
Repeat the pattern starting from the row 11. Alternate the 11th and 12th rows until you crochet to about your waistline. Then work the 2 row pattern using a larger size crochet hook to widen the garment until you crochet the desired length of the vest.

Edges
Work 2 sc rows around the body.
For each tie chain 42, and then work sl.sts back.